Send sp_send_dbmail only if results are available - sql

Question

I want to send an e-mail from my database only if the executed query has output and is not empty.
I was wondering how I can do this and where to embed this into my code. On top of my head, I thought of counting the results and having count > 0 or maybe something with the query in conjunction with ##rowcount > 0. What would you suggest?
Here is my code:
ALTER proc dbo.spBornBefore2000 as
set nocount on
DECLARE #sub VARCHAR(100),
#qry VARCHAR(max),
#msg VARCHAR(250),
#query NVARCHAR(max),
#tab char(1) = CHAR(9)
SELECT #sub = 'before 1990 -' + cast(getdate() as varchar(100))
SELECT #msg = N'blablabla.....'
SELECT #query = ' select id, name, dob, year(dob) as birth_year
from people
where year(dob) < 2000 '
EXEC msdb.dbo.sp_send_dbmail
#profile_name = 'USERS',
#recipients = 'abc#gmail.com',
#body = #msg,
#subject = #sub,
#query = #query,
#query_attachment_filename = 'before2000.csv',
#attach_query_result_as_file = 1,
#query_result_header = 1,
#query_result_width = 256 ,
#query_result_separator = #tab,
#query_result_no_padding =1;

Answer 1

You can do something like this:
EXEC(#query)
IF ##ROWCOUNT > 0
BEGIN
-- send email here
END

Answer 2

ALTER proc dbo.spBornBefore2000 as
set nocount on
DECLARE #sub VARCHAR(100),
#qry VARCHAR(max),
#msg VARCHAR(250),
#query NVARCHAR(max),
#tab char(1) = CHAR(9)
SELECT #sub = 'before 1990 -' + cast(getdate() as varchar(100))
SELECT #msg = N'blablabla.....'
SET #query = ' select id, name, dob, year(dob) as birth_year
from people
where year(dob) < 2000 '
IF EXISTS (select id, name, dob, year(dob) as birth_year
from people
where year(dob) < 2000)
begin
EXEC msdb.dbo.sp_send_dbmail
#profile_name = 'USERS',
#recipients = 'abc#gmail.com',
#body = #msg,
#subject = #sub,
#query = #query,
#query_attachment_filename = 'before2000.csv',
#attach_query_result_as_file = 1,
#query_result_header = 1,
#query_result_width = 256 ,
#query_result_separator = #tab,
#query_result_no_padding =1;
end
ELSE
begin
EXEC msdb.dbo.sp_send_dbmail
#profile_name = 'USERS',
#recipients = 'myself#gmail.com',
#body = 'No results returned'
end